Jannis/ha-xiaoxiang-bms
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3fc25c083b978077285d8d2694ca838ad7236046
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3 Commits

Author SHA1 Message Date
Jannis 3fc25c083b Switch to connect→poll→disconnect per cycle (single-connection BMS fix) 
The BMS only allows one simultaneous BLE connection. Keeping a persistent
connection blocked the mobile app from connecting at all.

Changes:
- BmsBluetoothHandler: replace connect()/disconnect()/request() public API
  with a single poll() method that owns the full connect→read→disconnect
  lifecycle. Connection is held only for the duration of one data fetch.
- Coordinator: gutted connection-state management — _async_update_data now
  just calls handler.poll() and processes results. No reconnect loop needed.
- Poll interval defaults: 15s default, 10s min, 300s max. The BLE connect
  overhead (~2s) makes sub-10s intervals impractical.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
 2026-04-11 20:09:43 +02:00
Jannis 5d527168e2 Full protocol coverage: binary sensors, energy, hardware version 
Sensors added:
- energy_stored (kWh = V × Ah / 1000) for energy dashboard

Binary sensors added (all from existing 0x03 frame, no extra BLE requests):
- Charge MOSFET / Discharge MOSFET (MOS gate status)
- Cell Balancing (any balance bit active)
- 13× protection flags: cell/pack over/under-voltage, charge/discharge
  over/under-temperature, charge/discharge over-current, short circuit,
  frontend IC error, software lock

Other:
- Hardware version string fetched once via CMD 0x05, shown in device card
- DeviceInfo centralised on coordinator (sensor + binary_sensor share it)
- CONF_ADDRESS removed from sensor.py (coordinator holds address)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
 2026-04-11 19:52:10 +02:00
Jannis 4a769bf50f Initial commit: Xiaoxiang Smart BMS Home Assistant integration 
- BLE GATT communication via bleak (UART-over-GATT, service 0xff00)
- Parses 0x03 (general info) and 0x04 (cell voltages) frames
- Protocol verified against official RS485/UART spec V4
- DataUpdateCoordinator with 5s poll interval (configurable 2-60s)
- Auto-reconnect on BLE disconnect
- Config flow: BT auto-discovery + manual MAC entry + options flow
- Sensors: voltage, current, power, SoC, capacity, cycles, temps, cells, cell delta
- HACS-ready (hacs.json, manifest.json)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
 2026-04-11 19:07:18 +02:00